Coated capillary chromatographic column

Details Coated capillary chromatographic column Coated capillary chromatographic column

B - Operations, Transporting

01

D

183/20, 252/34

B01D 15/08 (2006.01) C03C 17/30 (2006.01) C03C 17/34 (2006.01)

Patent

CA 1169413

ABSTRACT OF THE DISCLOSURE In the production of a wall coated open- tubular capillary chromatographic column, improved deactivation of the inner surface of a glass or fused silica capillary tube prior to coating with stationary phase is obtained by a multi-step process whereby siloxane polymer molecules are chemically bonded to the capillary inner surface. The process comprises multiple cycles of successive reactions with silicon tetrachloride and a diorganodichlorosilane vapor with intermediate hydrolyses and a final capping reaction with a triorganochlorosilane. The deactivated surface is adapted to coating with an apolar liquid stationary phase.

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